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The Variational And Numerical Approach ToContact With Dry Friction And Non AssociatedPlasticity Of Soils: The Implicit StandardMaterials

1970; WIT Press; Volume: 1; Linguagem: Inglês

10.2495/con930141

1746-4471

Géry de Saxcé, Lahbib Bousshine,

Granular flow and fluidized beds

The work is devoted to numerical simulation of structures involving both contact with friction and plasticity of soils. It is well known that such material behaviours exhibit non associated laws. A new modelization of the law is proposed to recover flow rule normality for non standard material, in particulard for soil. THE IMPLICIT STANDARD MATERIALS A good generalization of the standard materials was proposed in [2-4], with preserves the notion of extremal couple and the convexity assumptions. For this family of materials, called implicit standard materials, the existance of a function b(x,y), convex with respect to x, when y remains constant, and convex with respect to y, when x remains constant, is postulated. The function b is said a bipotential if the following inequality is satisfied: